Nannies working in a family home are almost always employees — not self-employed. The family becomes the employer and must operate PAYE, pay at least the National Minimum Wage, and provide a written employment contract within 2 months. Ofsted-registered childminders are self-employed and issue their own contracts.
Legal reference: Employment Rights Act 1996; National Minimum Wage Act 1998; Childcare Act 2006 (Ofsted); Equality Act 2010